US 12,276,541 B2
Method and system for non-invasive vibration-based condition monitoring of a machine
Ricardo Alexandre De Matos Antunes Ferreira, Braga (PT); Tim Böhnert, Braga (PT); and Elvira Paz Pérez De Colosía, Braga (PT)
Assigned to INTERNATIONAL IBERIAN NANOTECHNOLOGY LABORATORY (INL), Braga (PT)
Appl. No. 17/996,081
Filed by International Iberian Nanotechnology Laboratory (INL), Braga (PT)
PCT Filed Apr. 27, 2021, PCT No. PCT/IB2021/053472
§ 371(c)(1), (2) Date Oct. 13, 2022,
PCT Pub. No. WO2021/220162, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 116300 (PT), filed on Apr. 27, 2020; and application No. 20190156 (EP), filed on Aug. 7, 2020.
Prior Publication US 2023/0142616 A1, May 11, 2023
Int. Cl. G01H 11/04 (2006.01); G01M 99/00 (2011.01)
CPC G01H 11/04 (2013.01) [G01M 99/005 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for non-invasive vibration-based condition monitoring of a machine and moving parts of the machine, comprising:
attaching a magnet to an exterior surface of a frame of a machine that comprises the frame and at least one moving part that is located in an interior of the frame and is mechanically coupled to the frame;
placing a magnetoresistive sensor at a location that is external to the machine, at a distance from the machine, and at a predetermined distance from the magnet, in a manner such that the magnetoresistive sensor is mechanically uncoupled from said machine, and is operating in a dynamic part of a sensor transfer function in respect of a magnetic field produced by the magnet;
detecting a time-domain magnetic field signal transduced by the magnetoresistive sensor, including a broadband response of the magnetoresistive sensor that includes 0 Hz or a DC component, wherein the time-domain magnetic field signal includes first information representing a first movement of the frame of the machine and second information representing a second movement of the at least one moving part;
extracting from the time-domain magnetic field signal the second information representing the second movement of the at least one moving part; and
determining a condition of the at least one moving part located in the interior of the frame of the machine based on the second information representing the second movement of the at least one moving part.